1. TKR-Grid I/F Design Options Grid TKR Flexure Shoulder Bolt (close fit) Conical Bushing Grid TKR Flexure Shoulder Bolt Collar/Pin with conical head (pressed in) Light pressed pin takes all shear load. Bolt simply holds pin in place. Need to work out method for extraction 1 2

2. Grid TKR Flexure Grid Shoulder insert (close fit) Tapered split rings to expand radially under axial compression TKR-Grid I/F Design Options Grid TKR Flexure Custom Shoulder Bolt with tapered end (close fit) Constant Force Washer Shoulder bolt 3 4

3. TKR-Grid I/F Design Options (fastener locking) Lock wire Key insert Set screw Liquid Shim on shoulder “Battery terminal” on side flexures Urelane (loc-tite) threads

4. TKR-Grid I/F Design Options (key decision) Conical bushing (concept 1) favored for corner flexures Issue: Imparted loads due to enforced displacement – need to look into maximum allowable enforced skew of TKR bottom tray Issue: imparted hoop stressed in flexure Action for Tom Borden: how to modify tooling to put conic into existing flexures (enough room for taper?) Action – ensure taper is not a self-locking taper Action – check loads on flexure and bottom tray Liquid Shim at side flexures (zero tolerance plus positive locking) – need to ream existing holes to achieve 0.030 clearance or grind down shoulder, plus injection port, split washer, etc. Action – Martin to talk with Rob Black regarding injection and liquid shim 0.551”

5. TKR-EM Tower Path to Re-vib (T. Venator) 1.Grid I/F redesign concept Define concept Define Schedule New Vib Plates 2.Flexure tray I/F analysis redesign? 3.Analysis of all tower fastener torques and locking features 4.Resolve sidewall design options 120 degree fastener heads Mid tray mods, etc.